Universe Flashcards
1.
Universe is a singularity
2.
Expands rapidly and is full of electromagnetic radiation in the form if high energy gamma photons.
3.
First fundament particles are made.
Quarks and leptons
4.
Quarks combine to form first hadron ( proton/ neutron)
5.
Creation stops for 1 second
6.
Photon and neutrons form deuterium and helium and tiny amounts of lithium and beryllium. 25% in the universe is helium nuclei
7.
Universe cools down to form first atoms. Em radiation us converted into microwaves
8.
First star appears. Heavier elements after Li start to form.
9.
Galaxy, milky way forms as gravitational forces pulls clouds of hydrogen and existsing stars together
10.
Solar system forms from nebula from left over supernova. After the sun formed remaining materials used for earth and other planets.
11.
Humans appear!!
How was dark energy founded?
A star had less light intensity then predicted and the only possible conclusion was the universe was expanding but an energy source is required first acceleration. But no source was found so dark energy was used.
How did dark matter come about?
Studying the doppler effect the velocity if the stats in the galaxy dudnt behave as expected. It was expect that their velocity would decrease as the distance from centre of galaxy increases. But instead velocity was increasing.
What did the observation suggest?
The mass of the galaxy isnt concentrated in the centre but most matter is in the centre. So dark matter is spread throughout the universe.
Two key points for big bang theory?
Hubbles law and microwave background radiation
